Method of working metals



0. C. GI LBERT AND E. W. ADAMS.

METHOD OF WORKING METALS. APPLICATION FILED JUNE 24, 1919.

Patented July 12, 1921.

UNITED STATES OLIVER C. GILBERT, OFNEVI N. Y.,

NEW JERSEY; SAID ADAMS ASSIGNOR TO SAID GILBERT,

All'lD: EDGAR N. ADAMS, OF EAST ORANGE,

METHOD OF VIORKING METALS.

Application filerl ll'une 24,

1 0 all whom may concern Be it lmo'wn. that we, Onivnn C. GILBERT andSlocan W. Armies, citizens of the United States, residing athlew York,in the county of New York and Flt-ate of New Yorlg'and at East Grange,in thc'county of Essex and State of New Jersey, respectively, haveinvented certain new and useful improvements in llclethods o'lf VorkingMetals, of which the following is a full, clear, concise, and exactdescription.

This invention relates to a processitor winking metals and their.alloys. llilore'partioularly, the invention relates to a process ofdrawing metals whereby the drawn metal is given a shape, which cannot beobtained by the use of rolls and which cannot be feast bly attained withthe use of a shaping die.

In the embodiment illustrated, the improved process is shown as appliedin the manufacture of tinsel formed of copper or other non-ferrousmetals but it is to be understood the invention is not limited to thisspecific application or to the treatment of metals having thesusceptibilities of copper or other nonferrous metals because theprocess herein may be employed to advantage for other purposes than thefabrication of tinsel and for the workingof all metals whethernon-ferrous or not.

F igure 1 of the drawings illustrates dia grammatically a means by whichthe process may be employed. Fig. 2 is an enlarged per spective view ofthe die employed in the drawing process and also showing in detail theshape imparted to the drawn metal by the drawing operation.

Fig. 3 shows diagrammatically the steps generally employed in themanufacture of tinsel, the size of the metal being greatly magnified.

Fig. 4 illustrates diagrammatically the steps employed in themanufacture of tinsel where a metal drawn by the process hereinillustrated is employed, the size of themetal being greatly magnified.

In carrying out the process, wire 0 formed of copper or othernon-ferrous metal, is wound upon a storage roll 1, and steel wire 3 iswound upon a storage roll 2. The capacity of the roll 2 containing thesteel wire may be much less than the capacity of the roll 1, the reasonsfor which will hereinafter appear. The copper and steel wires areSpecification of Letters Patent.

Patented July 12, 1921.

1919. 7 Serial No. 306,330.

drawn together througha die 3 by means oi drums 4 and 5, to which thecopper and steel-wires are connected respectively. The drum 4 is drivenby a pulley '6 and belt 7 connected to any suitable source of motivepower, while the drum 5 is driven by a large gear 8 meshing with a smallgear 9 fastened upon the shaft 10 supporting the drum 4 and pulley 6.Due to this driving arrangement, the drum 4 is driven at a much greaterspeed than the drum 5 andconsequently the length of the copper wiredrawn through the die 3 is much greater thanthatot the steel wire. 1 Thecopper or other non terrous metal wire is much softer; than the steelwire and when both are simultaneously drawn through the die, the steelwire will'not be materially affected by the action of thedie, whereasthe copper wire willbe formedinto a substantial crescent shapems isshown in Fig. 2, the entire surface of the copper wire being l1ardenedby contact with the sides of the die and the steel wire, 3. v The steelwire 3 has such a relatively slow movement through the die in comparisonwith the copper wire that it serves as a part of the die 3 to shape thedrawn copper wire. The steel wire-is given a continual and gradualmovement through the dieto distribute the weanincident to the drawingoperation along a considerable lengthcof wire. l

The process just described is well adapted for the manufacture oftinsel. In practice, tinsel is made by drawing copper or othernon-ferrous metal wire through a die which slightly reduces its crosssection, and at the same time gives the drawn metal tensile strength.The metal thus drawn is flattened to'produce tinsel. Fig. 4 of thedrawings illustrates these steps which have heretofore been employed formaking tinsel, 11 representing the wire previous to being drawn, 12 thedrawn and slightly reduced wire, and 13 the drawn wire flattened intotinsel. It has been found in practice that when tinsel is made in thismanner, the flat tening of the drawn metal destroys to a considerableextent the tensile strength imparted to it by the reducing operation,this loss of tensile strength increasing proportionally to the amount offlattening the drawn wire needs in order to form it into tinsel.

The process for drawing copper wire and increasing its tensile strength,which has through the die simultaneously with the copper wire and 16 thedrawn wire flattened into tinsel. The wire 15 drawn by the processpreviously described has a great tensile strength, and having-a crescentshape, needs much less flattening to form it into tinsel.

than where the drawn wire has a circular cross section.

What is claimed is: l 1.'The method of worklng non-ferrous metalsconsisting in drawing a non-ferrous metal and a metal harder than thenon-ferrous metal through adie together.

2. The method of working non-ferrous metals consisting in drawing anon-ferrous metal and a metal harder than the non-ferrous metal througha die together and causing one of the metals to pass through'the die ata greater speed than the other.

3. The method of working non-ferrous metals consisting in drawing anon-ferrous metal and a metal harder than the non-ferrous metal througha die together and cans ing the non-ferrous metal to pass through thedie at a greater speed than the other 1 metal.

copper wire to pass through the die at a greater speed than the steelwire.

6. The method of making tinsel consisting in drawing wire to give it acrescent cross section'and then flattening the drawn wire.

7. The method of making tinsel consisting in drawing a non-ferrous metaland a hard metal through a die together to form nonierrous wire having acrescent-shaped cross section.

8. The method of making tinsel consisting in drawing a non-ferrous metaland a hard metal through a die together to form a nonferrous wirehaving'a crescent-shaped cross section and then flattening the drawnwire.

9. The method of working metals consisting in drawing two metals ofdifferent degrees of hardness through a die together and causing one ofthe metals to pass through the die at a. greater speed than the other.

10. The method of working metals consisting in drawing two metals ofdifferent degrees of hardness through a die'together and causing thesofter metal to pass through the die at a greater speed than the othermetal.

11. The method of making tinsel consisting in drawing two metals ofdifferent degrees of hardness through a die together so as to give thesofter metal acrescent-shaped cross section.

' 12. The method of making tinsel consisting in drawing two metals ofdifferent degrees of hardness through a die together so as to give thesofter metal a crescent-shaped cross section and then flattening thedrawn metal.

In witness whereof, we hereunto subscribe our names this 19th day ofJune A. D., 1919.

OLIVER o. GILBERT. EDGAR w. ADAMS.

